Abstract

We demonstrate an efficient scheme for the generation of broadband, high-energy, circularly polarized femtosecond laser pulses in the deep ultraviolet through seeded degenerate four-wave mixing in stretched gas-filled hollow capillary fibers. Pumping and seeding with circularly polarized 35 fs pulses centered at 400 nm and 800 nm, respectively, we generate idler pulses centered at 266 nm with 27 µJ of energy and over 95% spectrally averaged ellipticity. Even higher idler energies and broad spectra (27 nm bandwidth) can be obtained at the cost of reduced ellipticity. Our system can be scaled in average power and used in different spectral regions, including the vacuum ultraviolet.

© 2020 Optical Society of America

Ultrafast circularly polarized pulses tunable from the vacuum to deep ultraviolet

Athanasios Lekosiotis, Christian Brahms, Federico Belli, Teodora F. Grigorova, and John C. Travers
Opt. Lett. 46(16) 4057-4060 (2021)

Highly efficient deep UV generation by four-wave mixing in gas-filled hollow-core photonic crystal fiber

Federico Belli, Amir Abdolvand, John C. Travers, and Philip St. J. Russell
Opt. Lett. 44(22) 5509-5512 (2019)

Measurements of microjoule-level, few-femtosecond ultraviolet dispersive-wave pulses generated in gas-filled hollow capillary fibers

Cheng Zhang, Tiandao Chen, Jinyu Pan, Zhiyuan Huang, Donghan Liu, Ding Wang, Fei Yu, Dakun Wu, Yu Zheng, Ruochen Yin, Xin Jiang, Meng Pang, Yuxin Leng, and Ruxin Li
Opt. Lett. 47(18) 4830-4833 (2022)

Resonant dispersive wave emission in hollow capillary fibers filled with pressure gradients

Christian Brahms, Federico Belli, and John C. Travers
Opt. Lett. 45(16) 4456-4459 (2020)

Generation of broadband circularly polarized supercontinuum light in twisted photonic crystal fibers

Rafal P. Sopalla, Gordon K. L. Wong, Nicolas Y. Joly, Michael H. Frosz, Xin Jiang, Goran Ahmed, and Philip St.J. Russell
Opt. Lett. 44(16) 3964-3967 (2019)